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Prof. Dr. Ryusuke Hatano
Hokkaido University

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Short Biography

He has worked for various international joint research projects related to nutrient cycling in ecosystems, nutrient discharge to streams, and GHGs emissions from soil to atmosphere in East Siberia, South China, Japan, and tropical peatlands in Indonesia and Malaysia. He has published more than 150 peer reviewed papers in international Journals related to the sciences of agriculture, environment and soil. He has been a member of the Editorial Board of the Soil Science and Plant Nutrition, Pedosphere, Geoderma Regional and Agriculture. He was a former president of Japanese Society of Soil Physics, and now he is a chair of Division 2 of IUSS and a president of Japanese Society of Soil Science and Plant Nutrition.

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Journal article
Published: 20 May 2021 in Agriculture
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It is well known that submerged soils emit high levels of methane (CH4) due to oxygen deprivation and free iron oxide causing a quick reduction. However, there are other soil properties that control the reduction processes in soil, especially the amount of soil organic carbon (SOC). This study aimed to investigate the major factors controlling CH4 production potential (CH4PP) in Thai paddy fields. Two provinces, Ayutthaya, a clay soil region, and Khonkaen, a sandy soil region, were selected to represent a wide range of soil textures. Soil characteristic analysis pre- and post-incubation, and weekly gas detection in an incubation experiment over two months, was conducted. Stepwise multiple regression analysis was employed to analyze major soil factors controlling CH4PP. For the regional prediction of CH4PP, a map dataset of Ayutthaya and Khonkaen by the Land Development Department, Thailand, and a soil texture map (with intersected point data using the soil property map in ArcGIS) by OpenLandMap, were used. CH4PP was correlated with 1:10 pH, Fe2+, and water-soluble organic carbon (WSOC) measured after incubation. Although CH4PP showed no significant correlation with any soil properties measured before incubation, CH4PP was correlated with SOC, 1:10 electrical conductivity (EC), exchangeable ammonium (ExNH4), and sand content. It was thought that SOC and ExNH4 were related to organic matter decomposition, 1:10 EC was related to SO42− reduction and sand content was related to free oxides. Predicted regional CH4PP was similar in Ayutthaya and Khonkaen, although SOC, ExNH4 and 1:10 EC was higher, and sand content was lower in Ayutthaya than in Khonkaen. In both regions, the distribution of CH4PP corresponded to SOC, and CH4PP was lower with lower sand content and higher 1:10 EC. In clayey Ayutthaya, higher CH4PP was observed in the area with higher ExNH4. This indicates that soil properties other than soil texture and SOC influence CH4PP in the paddy fields in Thailand.

ACS Style

Pongsathorn Sukdanont; Noppol Arunrat; Suphachai Amkha; Ryusuke Hatano. Evaluation of CH4 Emission in Two Paddy Field Areas, Khonkaen and Ayutthaya, in Thailand. Agriculture 2021, 11, 467 .

AMA Style

Pongsathorn Sukdanont, Noppol Arunrat, Suphachai Amkha, Ryusuke Hatano. Evaluation of CH4 Emission in Two Paddy Field Areas, Khonkaen and Ayutthaya, in Thailand. Agriculture. 2021; 11 (5):467.

Chicago/Turabian Style

Pongsathorn Sukdanont; Noppol Arunrat; Suphachai Amkha; Ryusuke Hatano. 2021. "Evaluation of CH4 Emission in Two Paddy Field Areas, Khonkaen and Ayutthaya, in Thailand." Agriculture 11, no. 5: 467.

Review article
Published: 16 April 2021 in Geoderma Regional
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Being critical to achieving Sustainable Development Goals (SDGs) of the United Nations, strengthening understanding of the properties and processes of soil at national and regional scales is imperative. The necessity to realize SDGs by 2030 also inspires a greater sense of responsibility and care for soils. Sustainable management of soil health is important to achieving several SDGs. Pertinent SDGs intricately connected with soil health include SDG 1 (End Poverty), 2 (Zero Hunger), 3 (Good Health and Wellbeing), 5 (Gender Equality), 6 (Clean Water and Sanitation), 7 (Affordable and Clean Energy), 9 (Industry Innovation and Infrastructure), 11 (Sustainable Cities and Communities), 12 (Responsible Consumption and Production), 13 (Climate Action), and 15 (Life on Land). Some of these SDGs rely considerably on plant production and others depend on soil processes. Pertinent among soil processes are water movement, heat transfer, sorption and physical filtration, ion exchange, and biochemical and biophysical transformations. In terms of specific accomplishments, 130 countries have aligned with the Zero Hunger Challenge, the globally available fresh water has decreased to 71% of needs, Technosols (soils whose formation is influenced by anthropogenic based materials) are used in urban ecosystems, food wastes are composted, specific targets of Land Degradation Neutrality have been signed by several countries, and soil C sequestration targets are widely implemented through initiatives such as the 4 Per Thousand (4P1000) initiative, Platform on Climate Action in Americas (PLACA), Adapting African Agriculture (AAA), Living Soils of the Americas (LiSAM), etc. In addition, policy and regulatory frameworks being widely promoted by several U.N. agencies (e.g., U.N. SDGs,limiting global warming to 1.5°C or 2 °C) can be supported by innovations in soil science including forensic soil science, remote sensing and other innovations. Soil health is becoming a central element of the research and innovation program of the EU, aiming to reach a 75% of healthy soils by 2030. In addition, the importance of soil health to human health and environmental issues is being widely promoted through educational books on soil science and secondary schools, as well as the revision of curricula. With continuous progress in movement into the digital world, transfer and communication of knowledge of the soil sciences can improve for the end users, policymakers, and the general public but additional efforts are needed. Soil science knowledge and research forms a significant contribution to specific aspects of food and nutritional security, human wellbeing, nature conservancy, and global peace and harmony. Achieving critical SDGs by 2030 can be facilitated by soil restoration and sustainable management.

ACS Style

Rattan Lal; Johan Bouma; Eric Brevik; Lorna Dawson; Damien J. Field; Bruno Glaser; Ryusuke Hatano; Alfred E. Hartemink; Takashi Kosaki; Bruce Lascelles; Curtis Monger; Cristine Muggler; Georges Martial Ndzana; Stefan Norra; Xicai Pan; Remigio Paradelo; Laura Bertha Reyes-Sánchez; Taru Sandén; Bal Ram Singh; Heide Spiegel; Junta Yanai; Jiabao Zhang. Soils and sustainable development goals of the United Nations: An International Union of Soil Sciences perspective. Geoderma Regional 2021, 25, e00398 .

AMA Style

Rattan Lal, Johan Bouma, Eric Brevik, Lorna Dawson, Damien J. Field, Bruno Glaser, Ryusuke Hatano, Alfred E. Hartemink, Takashi Kosaki, Bruce Lascelles, Curtis Monger, Cristine Muggler, Georges Martial Ndzana, Stefan Norra, Xicai Pan, Remigio Paradelo, Laura Bertha Reyes-Sánchez, Taru Sandén, Bal Ram Singh, Heide Spiegel, Junta Yanai, Jiabao Zhang. Soils and sustainable development goals of the United Nations: An International Union of Soil Sciences perspective. Geoderma Regional. 2021; 25 ():e00398.

Chicago/Turabian Style

Rattan Lal; Johan Bouma; Eric Brevik; Lorna Dawson; Damien J. Field; Bruno Glaser; Ryusuke Hatano; Alfred E. Hartemink; Takashi Kosaki; Bruce Lascelles; Curtis Monger; Cristine Muggler; Georges Martial Ndzana; Stefan Norra; Xicai Pan; Remigio Paradelo; Laura Bertha Reyes-Sánchez; Taru Sandén; Bal Ram Singh; Heide Spiegel; Junta Yanai; Jiabao Zhang. 2021. "Soils and sustainable development goals of the United Nations: An International Union of Soil Sciences perspective." Geoderma Regional 25, no. : e00398.

Original research article
Published: 08 April 2021 in Frontiers in Sustainable Food Systems
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Reduction of chemical fertilizers and effective use of livestock excrement are required for the realization of sustainable agriculture and reduction of greenhouse gas (GHG) emissions. The purpose of this study was to estimate the reduction rate of GHG emissions represented by comparing global warming potential (GWP) using organic fertilizers instead of chemical fertilizers. The study was conducted in a managed grassland on Andosol in southern Hokkaido for 3 years from May 2017 to April 2020. There were five treatment plots: no fertilizer, chemical fertilizer, manure, slurry, and digestive fluid. Organic fertilizers were applied such that the amount of NPK did not exceed the recommended application rate, and the shortage was supplemented with chemical fertilizers. Fluxes in CO2 caused by heterotrophic respiration (RH), CH4, and N2O were measured using the closed chamber method. Net ecosystem carbon balance (NECB) was obtained as net primary production + organic fertilizer application—RH—harvest. The GWP was estimated by CO2 equivalent NECB and CH4 and N2O emissions in each treatment. Chemical fertilizer nitrogen application rates in the organic fertilizer treatments were reduced by 10% for manure, 19.7% for slurry and 29.7% for digestive fluid compared to chemical fertilizer only, but the grass yields were not significantly different among the fertilizer treatments. The 3-year NECB showed significantly smallest carbon loss in manure treatment, and smaller carbon loss in the organic fertilizer treatments than in the chemical fertilizer only. The reduction rate in the GWP with use of organic fertilizers relative to that of chemical fertilizer was 16.5% for slurry, 27.0% for digestive fluid, and 36.2% for manure. The NECB accounted for more than 90% of the GWP in all treatments. CH4 emissions were < 0.1% of the GWP. On the other hand, N2O emissions accounted for more than 5% of the GWP, and was larger in the order of slurry > chemical fertilizer only > digestive fluid > manure. As a conclusion, these organic fertilizers can be used without no reduction of crop yield instead of chemical fertilizer, however, manure is the best way to increase soil carbon and to decrease GWP, followed by digestive fluid.

ACS Style

Ryosuke Kitamura; Chiho Sugiyama; Kaho Yasuda; Arata Nagatake; Yiran Yuan; Jing Du; Norikazu Yamaki; Katsuro Taira; Masahito Kawai; Ryusuke Hatano. Effects of Three Types of Organic Fertilizers on Greenhouse Gas Emissions in a Grassland on Andosol in Southern Hokkaido, Japan. Frontiers in Sustainable Food Systems 2021, 5, 1 .

AMA Style

Ryosuke Kitamura, Chiho Sugiyama, Kaho Yasuda, Arata Nagatake, Yiran Yuan, Jing Du, Norikazu Yamaki, Katsuro Taira, Masahito Kawai, Ryusuke Hatano. Effects of Three Types of Organic Fertilizers on Greenhouse Gas Emissions in a Grassland on Andosol in Southern Hokkaido, Japan. Frontiers in Sustainable Food Systems. 2021; 5 ():1.

Chicago/Turabian Style

Ryosuke Kitamura; Chiho Sugiyama; Kaho Yasuda; Arata Nagatake; Yiran Yuan; Jing Du; Norikazu Yamaki; Katsuro Taira; Masahito Kawai; Ryusuke Hatano. 2021. "Effects of Three Types of Organic Fertilizers on Greenhouse Gas Emissions in a Grassland on Andosol in Southern Hokkaido, Japan." Frontiers in Sustainable Food Systems 5, no. : 1.

Journal article
Published: 31 March 2021 in Atmosphere
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To evaluate the effect of vegetation change on greenhouse gas (GHG) budget from a wetland ecosystem, the CO2, CH4 and N2O budgets from whole area (21.5 ha) of the Bibai Wetland, where dwarf bamboo (Sasa) or Ilex has invaded into original Sphagnum dominated vegetation, located in Hokkaido, Japan were estimated. The original Sphagnum-dominated vegetation was changed from a sink to a source of CO2 by invasion of short-Sasa (50 cm > height), while the invasion of tall-Sasa (50 cm < height < 150 cm) or Ilex increased CO2 uptake. Annual CH4 emission was decreased by the invasion of Sasa or Ilex. The annual N2O emission was slightly increased by invasion of Ilex only. These GHG budgets were correlated with the environmental factors related to the water table depth. The distribution of vegetation and environmental factors was estimated from satellite image bands, and the GHG budget of the entire wetland was estimated. The whole wetland area was considered to be a sink for GHG (−113 Mg CO2-eq y−1) and CO2 uptake by tall-Sasa occupied 71% of the GHG budget. The vegetation change due to the lowering of the water table depth currently increases the rate of carbon accumulation in the ecosystem by about 5 times.

ACS Style

Akane Kagemoto; Fumiaki Takakai; Osamu Nagata; Masayuki Takada; Ryusuke Hatano. Spatial Evaluation of Greenhouse Gas Fluxes in a Sasa (Dwarf Bamboo) Invaded Wetland Ecosystem in Central Hokkaido, Japan. Atmosphere 2021, 12, 448 .

AMA Style

Akane Kagemoto, Fumiaki Takakai, Osamu Nagata, Masayuki Takada, Ryusuke Hatano. Spatial Evaluation of Greenhouse Gas Fluxes in a Sasa (Dwarf Bamboo) Invaded Wetland Ecosystem in Central Hokkaido, Japan. Atmosphere. 2021; 12 (4):448.

Chicago/Turabian Style

Akane Kagemoto; Fumiaki Takakai; Osamu Nagata; Masayuki Takada; Ryusuke Hatano. 2021. "Spatial Evaluation of Greenhouse Gas Fluxes in a Sasa (Dwarf Bamboo) Invaded Wetland Ecosystem in Central Hokkaido, Japan." Atmosphere 12, no. 4: 448.

Journal article
Published: 17 March 2021 in Physics and Chemistry of the Earth, Parts A/B/C
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Hiso River watershed (HRW) is within a radiocesium contaminated area caused by the disaster in Fukushima Daiichi nuclear power plant (FDNPP). The FDNPP accident resulted in enormous changes in land use in HRW. It's urgently needed to evaluate impacts of climate and land-use changes on hydrological process, which further control pollutants transport in HRW. A combination method of Statistical DownScaling Model (SDSM) and Soil and Water Assessment Tool (SWAT) was applied to generate future climatic and hydrologic variables. Future climate data was obtained from three Representative Concentration Pathway (RCP2.6, 4.5 and 8.5) scenarios of a single General Circulation Models in three future periods of 2030s, 2060s and 2090s (2010–2039, 2040–2069, 2070–2099), with a baseline period (1980–2009). According to land-use change in HRW during 2013–2017, three land-use change scenarios under the three future climate scenarios were established. Results suggested that SDSM showed good capabilities in capturing daily maximum/minimum temperature and precipitation. The SWAT model presented good performances in simulating monthly and yearly streamflow. Results also suggested projected higher temperatures and lower rainfall led to decreased annual water yield and evapotranspiration (ET). The annual water yield and ET decreased in most seasons while had a slight increase in spring. RCP8.5 scenario always generated larger magnitudes for climatic variables and water balance components compared with other climate scenarios. Land-use changes had strong impact on surface runoff and groundwater flow. These results emphasize the necessity of considering impacts of climate and land-use changes on hydrological processes when making decontamination policy in radiocesium contaminated areas.

ACS Style

Shilei Peng; Chunying Wang; Ryusuke Hatano; Sadao Eguchi; Kazunori Kohyama; Seiko Yoshikawa; Sunao Itahashi; Masato Igura; Satoru Ohkoshi; Kanta Kuramochi. Response of hydrological processes to climate and land use changes in Hiso River watershed, Fukushima, Japan. Physics and Chemistry of the Earth, Parts A/B/C 2021, 103010 .

AMA Style

Shilei Peng, Chunying Wang, Ryusuke Hatano, Sadao Eguchi, Kazunori Kohyama, Seiko Yoshikawa, Sunao Itahashi, Masato Igura, Satoru Ohkoshi, Kanta Kuramochi. Response of hydrological processes to climate and land use changes in Hiso River watershed, Fukushima, Japan. Physics and Chemistry of the Earth, Parts A/B/C. 2021; ():103010.

Chicago/Turabian Style

Shilei Peng; Chunying Wang; Ryusuke Hatano; Sadao Eguchi; Kazunori Kohyama; Seiko Yoshikawa; Sunao Itahashi; Masato Igura; Satoru Ohkoshi; Kanta Kuramochi. 2021. "Response of hydrological processes to climate and land use changes in Hiso River watershed, Fukushima, Japan." Physics and Chemistry of the Earth, Parts A/B/C , no. : 103010.

Conference paper
Published: 01 March 2021 in IOP Conference Series: Earth and Environmental Science
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N2O is a greenhouse gas with a radiative forcing 298 times that of CO2 and is the substance that contributes most to the destruction of the stratospheric ozone layer. Current global N2O emission from the earth surface is 18.5 Tg y−1. Soil N2O emission is 13 Tg y−1, in which agricultural soil N2O emission accounts for 7 Tg y−1. N2O is produced as byproduct during nitrification process and interim product during denitrification process, mainly produced by denitrification in soils with increasing fertilizer application, as evidenced in agricultural fields. N2O emission increased significantly during the practices of fertilizer application, compost application, and harvesting, and peaked at a soil temperature of 20 °C or higher and a water-filled pore space of 60-70%. N2O emissions increased due to a decrease in soil pH. Soil pH tended to increase with the application of compost, and N2O in the compost plot decreased over time compared to the chemical fertilizer plot. This is because the optimal pH of incomplete denitrifying bacteria causing nitrous oxide emission is lower than that of complete denitrifying bacteria. Therefore, it is recognized that the pH should be 6.5 or more to suppress the N2O. In order to make better handling of compost, compost pellet has been developed, because it was found that nitrogen addition into compost pellet reduces N2O emission. N2O emission is related to the amount of inorganic nitrogen in soil. N2O emission increases with organic matter decomposition in soil and nitrogen fertilizer application. In organic soil (peat), huge N2O emission of several 100 kgN ha−1 y−1 was found in vegetable fields in a tropical peat land. Organic matter decomposition increases with drop of ground water table level, enhancing N2O emission. An eight-year oil palm plantation study at a tropical peat land showed that NO3- N concentration decreased and N2O emissions decreased with the increase in oil palm yield. The yield of oil palm increased with the increase of water-filled pore space of the soil and N2O significantly decreased when the water-filled pore space became more than 70%. Therefore, following three managements are recommended to reduce N2O emission from agricultural soil: 1) Restrict excessive nitrogen application (apply nitrogen according to the amount of nitrogen taken up by crops); 2) Prevent excessive organic matter decomposition (maintain capillary water rise without excessively decreasing ground water table level in peatlands); 3) Prevent low pH of soil (apply compost to reduce chemical nitrogen fertilizer application).

ACS Style

Ryusuke Hatano. Agricultural soil management to reduce N2O emission. IOP Conference Series: Earth and Environmental Science 2021, 694, 012003 .

AMA Style

Ryusuke Hatano. Agricultural soil management to reduce N2O emission. IOP Conference Series: Earth and Environmental Science. 2021; 694 (1):012003.

Chicago/Turabian Style

Ryusuke Hatano. 2021. "Agricultural soil management to reduce N2O emission." IOP Conference Series: Earth and Environmental Science 694, no. 1: 012003.

Journal article
Published: 25 February 2021 in Geoderma
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Topsoil is the most sensitive to land management practices, and the application of fire has been used for clearing the land and burning crop residues in highlands. Thus, investigating the topsoil organic carbon density (SOCD) is crucial to improve the understanding of its impact. Four sites of highland maize-upland rice systems in the Mae Chaem Basin, Chiang Mai Province, Thailand were selected as study areas and investigated for two years . At each site, burnt and unburnt soil samples were collected separately from depths of 0–10, 10–20, and 20–30 cm. Results showed that burnt soil contained higher SOCD than unburnt soil, with average values of 75.0 and 71.4 Mg C ha−1, respectively; however, a significant difference was not detected. The SOCD of burnt soils increased in the first growing season after the burning 5 months due to the large amounts of ashes and black carbon left after the fire and decreased in the second growing season after the burning 10 months. Burning caused the fluctuation of SOCD, resulting in a slight increase of SOCD in burnt soils by 0.19 Mg C ha−1 year−1, whereas it steadily increased by 2.04 Mg C ha−1 year−1 in unburnt soils across the maize-upland rice system. This study pointed out that burning may not sustain the SOCD in the long term, especially in the highlands.

ACS Style

Noppol Arunrat; Sukanya Sereenonchai; Ryusuke Hatano. Impact of burning on soil organic carbon of maize-upland rice system in Mae Chaem Basin of Northern Thailand. Geoderma 2021, 392, 115002 .

AMA Style

Noppol Arunrat, Sukanya Sereenonchai, Ryusuke Hatano. Impact of burning on soil organic carbon of maize-upland rice system in Mae Chaem Basin of Northern Thailand. Geoderma. 2021; 392 ():115002.

Chicago/Turabian Style

Noppol Arunrat; Sukanya Sereenonchai; Ryusuke Hatano. 2021. "Impact of burning on soil organic carbon of maize-upland rice system in Mae Chaem Basin of Northern Thailand." Geoderma 392, no. : 115002.

Chapter
Published: 19 February 2021 in World Soils Book Series
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This chapter provides the overview of soil types, land uses, and land managements of Japan. The soils of Japan are immature soils developed from the flesh parent materials such as volcanic tephra or ejecta or eroded or deposited materials in various landscapes from mountain terrain to alluvial plains within about 10,000 years. Japanese soils are generally acidic, since the basic cations of soils are leached by the high precipitation of the monsoon climate. According to the soil classification system of Japan newly developed in 2017, Brown Forest soils, Andosols, Fluvic soils, Red-Yellow soils, and Regosols cover 33.2, 30.3, 13.7, 7.6, and 6.9% of the country, respectively. In land uses of Japan in 2016, forests occupy 63.5% of the total land area of Japan (37.8 million ha). Cultivated land area was 4.47 million ha, which accounts for 12.0%. However, the cultivated land area has continuously decreased from 6.08 million ha in 1961. In Japan, from 1959 to 1978, the Fundamental Soil Survey for Soil Fertility Conservation was carried out and classified the crop production potential of cultivated land soils into four grades. Based on the results of the soil survey, field improvements have been performed to ameliorate the limiting factors for crop production. This has made it possible to set the fertilization standards for each crop in each region. The fertilization standards are defined as the amount of fertilizer that achieves the target yield without causing environmental issues and are the bases of the environmentally friendly agriculture. Based on the efforts in each region, in 1999, Japanese government enacted the Act on Promotion of Introduction of Sustainable Agricultural Production Practices.

ACS Style

Ryusuke Hatano; Hitoshi Shinjo; Yusuke Takata. Overview. World Soils Book Series 2021, 3 -9.

AMA Style

Ryusuke Hatano, Hitoshi Shinjo, Yusuke Takata. Overview. World Soils Book Series. 2021; ():3-9.

Chicago/Turabian Style

Ryusuke Hatano; Hitoshi Shinjo; Yusuke Takata. 2021. "Overview." World Soils Book Series , no. : 3-9.

Review
Published: 28 July 2020 in Soil Systems
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The COVID-19 pandemic has disrupted the global food supply chain and exacerbated the problem of food and nutritional insecurity. Here we outline soil strategies to strengthen local food production systems, enhance their resilience, and create a circular economy focused on soil restoration through carbon sequestration, on-farm cycling of nutrients, minimizing environmental pollution, and contamination of food. Smart web-based geospatial decision support systems (S-DSSs) for land use planning and management is a useful tool for sustainable development. Forensic soil science can also contribute to cold case investigations, both in providing intelligence and evidence in court and in ascertaining the provenance and safety of food products. Soil can be used for the safe disposal of medical waste, but increased understanding is needed on the transfer of virus through pedosphere processes. Strengthening communication between soil scientists and policy makers and improving distance learning techniques are critical for the post-COVID restoration.

ACS Style

Rattan Lal; Eric Brevik; Lorna Dawson; Damien Field; Bruno Glaser; Alfred Hartemink; Ryusuke Hatano; Bruce Lascelles; Curtis Monger; Thomas Scholten; Bal Singh; Heide Spiegel; Fabio Terribile; Angelo Basile; Yakun Zhang; Rainer Horn; Takashi Kosaki; Laura Sánchez. Managing Soils for Recovering from the COVID-19 Pandemic. Soil Systems 2020, 4, 46 .

AMA Style

Rattan Lal, Eric Brevik, Lorna Dawson, Damien Field, Bruno Glaser, Alfred Hartemink, Ryusuke Hatano, Bruce Lascelles, Curtis Monger, Thomas Scholten, Bal Singh, Heide Spiegel, Fabio Terribile, Angelo Basile, Yakun Zhang, Rainer Horn, Takashi Kosaki, Laura Sánchez. Managing Soils for Recovering from the COVID-19 Pandemic. Soil Systems. 2020; 4 (3):46.

Chicago/Turabian Style

Rattan Lal; Eric Brevik; Lorna Dawson; Damien Field; Bruno Glaser; Alfred Hartemink; Ryusuke Hatano; Bruce Lascelles; Curtis Monger; Thomas Scholten; Bal Singh; Heide Spiegel; Fabio Terribile; Angelo Basile; Yakun Zhang; Rainer Horn; Takashi Kosaki; Laura Sánchez. 2020. "Managing Soils for Recovering from the COVID-19 Pandemic." Soil Systems 4, no. 3: 46.

Review
Published: 22 July 2020 in Agronomy
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Soil organic carbon (SOC) improvement has become a sustainable strategy for enhancing soil resilience and reducing greenhouse gas (GHG) emissions in the rice cropping system. For tropical soils, the SOC accumulation was limited by the unfavorable environment, likely the sandy soil area in Northeast (NE) Thailand. This review aims to quantify and understand SOC in sandy paddy fields of NE Thailand. The existing research gap for alternative management practices is also highlighted to increase ecological and agronomic values. We review previous studies to determine the factors affecting SOC dynamics in sandy paddy fields, in order to enhance SOC and sustain rice yields. High sand content, up to 50% sand, was found in 70.7% of the observations. SOC content has ranged from 0.34 to 31.2 g kg−1 for the past four decades in paddy rice soil of NE Thailand. The conventional and alternative practice managements were chosen based on either increasing rice crop yield or improving soil fertility. The lack of irrigation water during the mild dry season would physically affect carbon sequestration as the soil erosion accelerates. Meanwhile, soil chemical and microbial activity, which directly affect SOC accumulation, would be influenced by nutrient and crop residue management, including chemical fertilizer, manure and green manure, unburned rice straw, and biochar application. Increasing SOC content by 1 g kg−1 can increase rice yield by 302 kg ha−1. The predicted carbon saturation varied tremendously, from 4.1% to 140.6% (52% in average), indicating that the sandy soil in this region has the potential for greater SOC sequestration. Our review also suggests that broadening the research of rice production influenced by sandy soil is still required to implement adaptive management for sustainable agriculture and future food security.

ACS Style

Noppol Arunrat; Praeploy Kongsurakan; Sukanya Sereenonchai; Ryusuke Hatano. Soil Organic Carbon in Sandy Paddy Fields of Northeast Thailand: A Review. Agronomy 2020, 10, 1061 .

AMA Style

Noppol Arunrat, Praeploy Kongsurakan, Sukanya Sereenonchai, Ryusuke Hatano. Soil Organic Carbon in Sandy Paddy Fields of Northeast Thailand: A Review. Agronomy. 2020; 10 (8):1061.

Chicago/Turabian Style

Noppol Arunrat; Praeploy Kongsurakan; Sukanya Sereenonchai; Ryusuke Hatano. 2020. "Soil Organic Carbon in Sandy Paddy Fields of Northeast Thailand: A Review." Agronomy 10, no. 8: 1061.

Journal article
Published: 27 December 2019 in Agriculture
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Since each greenhouse gas (GHG) has its own radiative capacity, all three gasses (CO2, CH4 and N2O) must be accounted for by calculating the net global warming potential (GWP) in a crop production system. To compare the impact of GHG fluxes from the rice growing and the fallow season on the annual gas fluxes, and their contribution to the GWP and carbon sequestration (CS) were evaluated. From May to April in Bibai (43°18′ N, 141°44′ E), in central Hokkaido, Japan, three rice paddy fields under actual management conditions were investigated to determine CS and the contribution of carbon dioxide (CO2), methane (CH4) and nitrous oxide (N2O) fluxes to GWP. Methane and N2O fluxes were measured by placing the chamber over the rice plants covering four hills and CO2 fluxes from rice plants root free space in paddy fields were taken as an indicator of soil microbial respiration (Rm) using the closed chamber method. Soil CS was calculated as the difference between net primary production (NPP) and loss of carbon (C) through Rm, emission of CH4 and harvest of crop C. Annual cumulative Rm ranged from 422 to 519 g C m−2 yr−1; which accounted for 54.7 to 55.5% of the rice growing season in particular. Annual cumulative CH4 emissions ranged from 75.5 to 116 g C m−2 yr−1 and this contribution occurred entirely during the rice growing period. Total cumulative N2O emissions ranged from 0.091 to 0.154 g N m−2 yr−1 and from 73.5 to 81.3% of the total N2O emissions recorded during the winter-fallow season. The CS ranged from −305 to −365 g C m−2 yr−1, suggesting that C input by NPP may not be compensate for the loss of soil C. The loss of C in the winter-fallow season was much higher (62 to 66%) than in the growing season. The annual net GWP from the investigated paddy fields ranged from 3823 to 5016 g CO2 equivalent m−2 yr−1. Annual GWPCH4 accounted for 71.9 to 86.1% of the annual net GWP predominantly from the rice growing period. These results indicate that CH4 dominated the net GWP of the rice paddy.

ACS Style

Habib Mohammad Naser; Osamu Nagata; Sarmin Sultana; Ryusuke Hatano. Carbon Sequestration and Contribution of CO2, CH4 and N2O Fluxes to Global Warming Potential from Paddy-Fallow Fields on Mineral Soil Beneath Peat in Central Hokkaido, Japan. Agriculture 2019, 10, 6 .

AMA Style

Habib Mohammad Naser, Osamu Nagata, Sarmin Sultana, Ryusuke Hatano. Carbon Sequestration and Contribution of CO2, CH4 and N2O Fluxes to Global Warming Potential from Paddy-Fallow Fields on Mineral Soil Beneath Peat in Central Hokkaido, Japan. Agriculture. 2019; 10 (1):6.

Chicago/Turabian Style

Habib Mohammad Naser; Osamu Nagata; Sarmin Sultana; Ryusuke Hatano. 2019. "Carbon Sequestration and Contribution of CO2, CH4 and N2O Fluxes to Global Warming Potential from Paddy-Fallow Fields on Mineral Soil Beneath Peat in Central Hokkaido, Japan." Agriculture 10, no. 1: 6.

Soil c and n by lumc
Published: 15 October 2019 in Soil Science and Plant Nutrition
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Conversion of grassland to cropland is widely reported to deplete soil organic carbon (SOC) largely due to tillage effects on the decomposition of SOC. However, most studies report on long-term changes in SOC following the conversion and little is known about the changes in the short term. Net ecosystem carbon budget (NECB) measures the difference between total C input (i.e., manure, above- and below-ground plant residues) and C loss through heterotrophic respiration (RH). However, most studies that report temporal SOC do not report other components of the NECB like RH, total C inputs and often do not include the cumulative annualized change of these components. This review evaluated the change in C input, RH, NECB and SOC after conversion of permanent/continuous grassland to cropland within 5 years after the conversion. We also reviewed and compared no-tillage and conventional tillage on SOC storage and accumulation. Total C input was higher in grassland than cropland largely due to high root biomass, as opposed to aboveground residue, and therefore grassland tended to have higher NECB. Despite higher NECB in grassland, the SOC stocks in cropland (cornfield) converted from grassland were greater than that in continuous grassland within first 2–3 years of conversion. The combination of manure C addition and tillage in cropland showed potential to maintain NECB and increase SOC. Within the continuous grassland C addition alone increased NECB but did not result in a corresponding increase in SOC. Residue retention and manure addition are recognized as good practices for increasing SOC, this study however, shows that combining them with occasional tillage, especially in managed grasslands, could increase the rate of SOC storage in soils.

ACS Style

Ikabongo Mukumbuta; Ryusuke Hatano. Do tillage and conversion of grassland to cropland always deplete soil organic carbon? Soil Science and Plant Nutrition 2019, 66, 76 -83.

AMA Style

Ikabongo Mukumbuta, Ryusuke Hatano. Do tillage and conversion of grassland to cropland always deplete soil organic carbon? Soil Science and Plant Nutrition. 2019; 66 (1):76-83.

Chicago/Turabian Style

Ikabongo Mukumbuta; Ryusuke Hatano. 2019. "Do tillage and conversion of grassland to cropland always deplete soil organic carbon?" Soil Science and Plant Nutrition 66, no. 1: 76-83.

Journal article
Published: 01 October 2019 in Agriculture
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(1) Background: Nitrogen (N) fertilization on drained tropical peatland will likely stimulate peat decomposition and mineralization, enhancing N2O emission from the peat soil. (2) Methods: A field experiment was conducted to quantify the N2O emissions from soil in an oil palm plantation (Elaeis guineensis Jacq.) located in a tropical peatland in Sarawak, Malaysia, under different rates of N fertilizers. The study was conducted from January 2010 to December 2013 and resumed from January 2016 to December 2017. Nitrous oxide (N2O) flux was measured every month using a closed chamber method for four different N rates; control—without N (T1), 31.1 kg N ha−1 yr−1 (T2), 62.2 kg N ha−1 yr−1 (T3), and 124.3 kg N ha−1 yr−1 (T4); (3) Results: Application of the N fertilizer significantly increased annual cumulative N2O emissions for T4 only in the years 2010 (p = 0.017), 2011 (p = 0.012), 2012 (p = 0.007), and 2016 (p = 0.048). The highest average annual cumulative N2O emissions were recorded for T4 (41.5 ± 28.7 kg N ha−1 yr−1), followed by T3 (35.1 ± 25.7 kg N ha−1 yr−1), T1 (25.2 ± 17.8 kg N ha−1 yr−1), and T2 (25.1 ± 15.4 kg N ha−1 yr−1), indicating that the N rates of 62.2 kg N ha−1 yr−1 and 124.3 kg N ha−1 yr−1 increased the average annual cumulative N2O emissions by 39% and 65%, respectively, as compared to the control. The N fertilization had no significant effect on annual oil palm yield (p = 0.994). Alternating between low (deeper than −60 cm) and high groundwater level (GWL) (shallower than −60 cm) enhanced nitrification during low GWL, further supplying NO3− for denitrification in the high GWL, and contributing to higher N2O emissions in high GWL. The emissions of N2O ranged from 17 µg N m−2 hr−1 to 2447 µg N m−2 hr−1 and decreased when the water-filled pore space (WFPS) was between 70% and 96%, suggesting the occurrence of complete denitrification. A positive correlation between N2O emissions and NO3− at 70–96% WFPS indicated that denitrification increased with increased NO3− availability. Based on their standardized regression coefficients, the effect of GWL on N2O emissions increased with increased N rate (p < 0.001). Furthermore, it was found that annual oil palm yields negatively correlated with annual N2O emission and NO3− for all treatments. Both nitrification and denitrification increased with increased N availability, making both processes important sources of N2O in oil palm cultivation on tropical peatland.; and (4) Conclusions: To improve understanding of N2O mitigation strategies, further studies should consider plant N uptake on N2O emissions, at least until the completion of the planting.

ACS Style

Auldry Chaddy; Lulie Melling; Kiwamu Ishikura; Ryusuke Hatano. Soil N2O Emissions under Different N Rates in an Oil Palm Plantation on Tropical Peatland. Agriculture 2019, 9, 213 .

AMA Style

Auldry Chaddy, Lulie Melling, Kiwamu Ishikura, Ryusuke Hatano. Soil N2O Emissions under Different N Rates in an Oil Palm Plantation on Tropical Peatland. Agriculture. 2019; 9 (10):213.

Chicago/Turabian Style

Auldry Chaddy; Lulie Melling; Kiwamu Ishikura; Ryusuke Hatano. 2019. "Soil N2O Emissions under Different N Rates in an Oil Palm Plantation on Tropical Peatland." Agriculture 9, no. 10: 213.

Review
Published: 08 May 2019 in International Agrophysics
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Peatland is a significant storage of carbon and nitrogen on the earth’s surface. This paper reviews the impacts of changes in water table level and mineral nitrogen associated with human activities on greenhouse gases emissions in tropical peatland and northern boreal and temperate peatland,...

ACS Style

Ryusuke Hatano. Impact of land use change on greenhouse gases emissions in peatland: a review. International Agrophysics 2019, 33, 167 -173.

AMA Style

Ryusuke Hatano. Impact of land use change on greenhouse gases emissions in peatland: a review. International Agrophysics. 2019; 33 (2):167-173.

Chicago/Turabian Style

Ryusuke Hatano. 2019. "Impact of land use change on greenhouse gases emissions in peatland: a review." International Agrophysics 33, no. 2: 167-173.

Journal article
Published: 07 December 2018 in Atmosphere
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Managed grassland is occasionally renovated to maintain plant productivity by killing old vegetation, ploughing, and reseeding. This study aimed to investigate the combined effect of grassland renovation and long-term manure application on the temporal dynamics of nitrous oxide (N2O) emission and nitrate nitrogen (NO3−–N) leaching. The study was conducted from September 2013 to September 2016 in a managed grassland renovated in September 2013. In this grassland, two treatments were managed—chemical fertilizer application (F treatment) and the combined application of chemical fertilizer and beef cattle manure (MF treatment)—for eight years before the renovation. The control treatment without fertilization (CT) was newly established in the F treatment. The soil N2O flux was measured using a closed chamber method. A leachate sample was collected using a tension-free lysimeter that was installed at the bottom of the Ap horizon (25 cm deep), and total NO3−–N leaching was calculated from leachate NO3−–N concentration and drainage volume was estimated by the water balance method. In the first year after renovation, the absence of plant nitrogen uptake triggered NO3−–N leaching following rainfall during renovation and increased drainage water after thawing. NO3−–N movement from topsoil to deeper soil enhanced N2O production and emission from the soil. N2O emission in MF treatment was 1.6–2.0 times larger than those of CT and F treatments, and NO3−–N leaching in MF treatment was 2.3–2.6 times larger than those of CT and F treatments in the first year. Mineral nitrogen release derived from long-term manure application increased NO3−–N leaching and N2O emission. In the second year, N2O emission and NO3−–N leaching significantly decreased from the first year because of increased plant N uptake and decreased mineral nitrogen surplus, and no significant differences in N2O emission and NO3−–N leaching were observed among the treatments. In the second and third years, NO3−–N leaching was regulated by plant nitrogen uptake. There were no significant differences in NO3−–N leaching among the treatments, but N2O emission in MF treatment was significantly smaller than in the F treatment. Long-term manure application could be a possible option to mitigate N2O emission in permanent grassland; however, the risk of increased NO3−–N leaching and N2O emission in the renovation year induced by manure nitrogen release should be noted.

ACS Style

Arata Nagatake; Ikabongo Mukumbuta; Kaho Yasuda; Mariko Shimizu; Masahito Kawai; Ryusuke Hatano. Temporal Dynamics of Nitrous Oxide Emission and Nitrate Leaching in Renovated Grassland with Repeated Application of Manure and/or Chemical Fertilizer. Atmosphere 2018, 9, 485 .

AMA Style

Arata Nagatake, Ikabongo Mukumbuta, Kaho Yasuda, Mariko Shimizu, Masahito Kawai, Ryusuke Hatano. Temporal Dynamics of Nitrous Oxide Emission and Nitrate Leaching in Renovated Grassland with Repeated Application of Manure and/or Chemical Fertilizer. Atmosphere. 2018; 9 (12):485.

Chicago/Turabian Style

Arata Nagatake; Ikabongo Mukumbuta; Kaho Yasuda; Mariko Shimizu; Masahito Kawai; Ryusuke Hatano. 2018. "Temporal Dynamics of Nitrous Oxide Emission and Nitrate Leaching in Renovated Grassland with Repeated Application of Manure and/or Chemical Fertilizer." Atmosphere 9, no. 12: 485.

Journal article
Published: 27 November 2018 in Atmosphere
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This study investigated spatial factors controlling CO2, CH4, and N2O fluxes and compared global warming potential (GWP) among undrained forest (UDF), drained forest (DF), and drained burned land (DBL) on tropical peatland in Central Kalimantan, Indonesia. Sampling was performed once within two weeks in the beginning of dry season. CO2 flux was significantly promoted by lowering soil moisture and pH. The result suggests that oxidative peat decomposition was enhanced in drier position, and the decomposition acidify the peat soils. CH4 flux was significantly promoted by a rise in groundwater level, suggesting that methanogenesis was enhanced under anaerobic condition. N2O flux was promoted by increasing soil nitrate content in DF, suggesting that denitrification was promoted by substrate availability. On the other hand, N2O flux was promoted by lower soil C:N ratio and higher soil pH in DBL and UDF. CO2 flux was the highest in DF (241 mg C m−2 h−1) and was the lowest in DBL (94 mg C m−2 h−1), whereas CH4 flux was the highest in DBL (0.91 mg C m−2 h−1) and was the lowest in DF (0.01 mg C m−2 h−1), respectively. N2O flux was not significantly different among land uses. CO2 flux relatively contributed to 91–100% of GWP. In conclusion, it is necessary to decrease CO2 flux to mitigate GWP through a rise in groundwater level and soil moisture in the region.

ACS Style

Kiwamu Ishikura; Untung Darung; Takashi Inoue; Ryusuke Hatano. Variation in Soil Properties Regulate Greenhouse Gas Fluxes and Global Warming Potential in Three Land Use Types on Tropical Peat. Atmosphere 2018, 9, 465 .

AMA Style

Kiwamu Ishikura, Untung Darung, Takashi Inoue, Ryusuke Hatano. Variation in Soil Properties Regulate Greenhouse Gas Fluxes and Global Warming Potential in Three Land Use Types on Tropical Peat. Atmosphere. 2018; 9 (12):465.

Chicago/Turabian Style

Kiwamu Ishikura; Untung Darung; Takashi Inoue; Ryusuke Hatano. 2018. "Variation in Soil Properties Regulate Greenhouse Gas Fluxes and Global Warming Potential in Three Land Use Types on Tropical Peat." Atmosphere 9, no. 12: 465.

Journal article
Published: 02 October 2018 in Soil and Tillage Research
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Land-use change between grasslands and croplands has a significant influence on soil organic carbon (SOC) and soil respiration (RS). However, the response of the different components of RS to land-use changes and variations in temperature and moisture regimes is poorly understood. This study investigated the responses of RS, heterotrophic respiration (RH) and root respiration (RR) to changes of soil temperature, moisture and nitrogen (N), and changes in SOC, accompanying with land-use changes for 11 years. The study was conducted in a >30-year old permanent grassland (OG; 2005–2009), that was ploughed and converted to a cornfield (2010–2012) and then converted to a new grassland (NG; 2013–2015). Three treatments, chemical fertilizer and manure, chemical fertilizer only, and unfertilized control, were assessed. Fluxes of RS and RH were measured using the closed chamber method. SOC was monitored at 0–15 and 15–30 cm soil depth. On average, RS decreased by 25–43% after conversion from OG to cornfield and then increased by 21–33% after the change from cornfield to NG. Contrary to RS, RH increased by more than 30% following land-use change from OG to cornfield and declined by at least 20% after converting cornfield to NG. The contribution of RH to RS was significantly higher in cornfield (60–100%) than in OG (38–60%) and NG (47–80%). The different trends of RS and RH following land-use change calls for a clear distinction of the CO2 source when reporting its emissions from soil. The influence of soil temperature, moisture and N on RS and RH differed among the land-uses. The conversion of grassland to cornfield significantly increased SOC, especially in the manure-amended plot. This increase in SOC in the first 1–3 years of conversion indicates that conversion or ploughing of grassland is important to turn plant litter/applied manure into actual soil carbon. These results call for a rethink of the commonly held notion that conversion of grassland to cropland depletes SOC, as the conversion could be beneficial if done for shorter time periods.

ACS Style

Ikabongo Mukumbuta; Mariko Shimizu; Ryusuke Hatano. Short-term land-use change from grassland to cornfield increases soil organic carbon and reduces total soil respiration. Soil and Tillage Research 2018, 186, 1 -10.

AMA Style

Ikabongo Mukumbuta, Mariko Shimizu, Ryusuke Hatano. Short-term land-use change from grassland to cornfield increases soil organic carbon and reduces total soil respiration. Soil and Tillage Research. 2018; 186 ():1-10.

Chicago/Turabian Style

Ikabongo Mukumbuta; Mariko Shimizu; Ryusuke Hatano. 2018. "Short-term land-use change from grassland to cornfield increases soil organic carbon and reduces total soil respiration." Soil and Tillage Research 186, no. : 1-10.

Journal article
Published: 01 September 2018 in Geoderma Regional
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This study was conducted to evaluate the change in total soil carbon [TSC = litter carbon (LIC) + soil organic carbon (SOC) + soil carbonate carbon (SCC)] associated with recent thermokarst activity and forest disturbance induced by the climate change and land use change in the permafrost-affected soils of Eastern Siberia. TSC stock from 80 sites in three types of the ecosystem: forests, arable land, and thermokarst were analyzed. The SOC content was positively correlated with root C density in all ecosystems. In the forest and arable land ecosystems, soil texture strongly affected SOC content, but water content was the main factor in SOC accumulation in the thermokarst ecosystem. Although the composition ratio of TSC stock significantly differed among the ecosystem, SOC was the main component of the TSC in all ecosystems. SOC and TSC stocks in thermokarst ecosystem (137.1 ± 125.5 Mg SOC ha−1 30 cm−1 and 150.5 ± 123.9 Mg TSC ha−1 30 cm−1) were significantly higher than those in the forest (28.3 ± 13.5 Mg SOC ha−1 30 cm−1 and 51.4 ± 20.9 Mg TSC ha−1 30 cm−1) and arable land ecosystem (41.9 ± 16.9 Mg SOC ha−1 30 cm−1 and 54.6 ± 23.1 Mg TSC ha−1 30 cm−1), suggesting that thermokarst formation accumulates C. In the thermokarst ecosystem, significantly higher SOC stock was observed in moderately-wet and wet grassland than dry grassland suggesting that flooding increases C by suppressing organic matter decomposition. Among the forest ecosystem, forest disturbance significantly altered the C balance. Forest fire did not change the SOC and SCC stock but significantly burned the LIC stock at an average rate of 51.7 ± 65.0% of the LIC. Water damage to the forest significantly increased the SOC stock by increasing the water content, but 58.5 ± 62.4% of the LIC stock was dismissed. Forest cultivation significantly reduced TSC stock at an average rate of 37.3 ± 47.2% by mineralization of the LIC. On the other hands, abandonment of arable land significantly restored TSC stock at an average rate of 92.4 ± 83.5% by increasing C input. This study revealed that redistribution of the C stock has been occurred under the climate change and human activity.

ACS Style

Shinya Iwasaki; Alexsey R. Desyatkin; Nikolai V. Filippov; Roman V. Desyatkin; Ryusuke Hatano. Carbon stock estimation and changes associated with thermokarst activity, forest disturbance, and land use changes in Eastern Siberia. Geoderma Regional 2018, 14, 1 .

AMA Style

Shinya Iwasaki, Alexsey R. Desyatkin, Nikolai V. Filippov, Roman V. Desyatkin, Ryusuke Hatano. Carbon stock estimation and changes associated with thermokarst activity, forest disturbance, and land use changes in Eastern Siberia. Geoderma Regional. 2018; 14 ():1.

Chicago/Turabian Style

Shinya Iwasaki; Alexsey R. Desyatkin; Nikolai V. Filippov; Roman V. Desyatkin; Ryusuke Hatano. 2018. "Carbon stock estimation and changes associated with thermokarst activity, forest disturbance, and land use changes in Eastern Siberia." Geoderma Regional 14, no. : 1.

Journal article
Published: 08 August 2018 in Atmosphere
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Central Yakutia is in one of the most northern agricultural centers of the world. In this territory a notable area of arable land was made by removing the boreal Taiga with the primary purpose of crop cultivation. Such a method of cultivation significantly changes soil total carbon (STC, soil organic carbon + soil carbonate carbon) balance, because of the destroyed upper humus horizon. Soil organic carbon (SOC) of cultivated arable lands is almost a half of that in forest. In abandoned arable lands with grass vegetation, the recovery of SOC has increased to 30% in comparison with cultivated arable lands. On arable lands recovering with new growth of trees, the SOC is related to the abandonment period. Soil carbonates carbon (SCC) content was significantly lower than SOC and showed significant difference among abandoned and other types of arable lands. Objectives of this study are to identify how STC stocks change in response to conversion of the forests to agricultural land and to analyze the arable land system’s recovery process after abandonment. Furthermore, after transformation of forest to arable land, a significant decrease of STC was observed, primarily due to mechanical loss after plant residue removal. It was also identified that the restoration and self-recovery of STC in abandoned arable lands of Central Yakutia continuously and slightly increase. Grass vegetation regenerates STC for 20 years. While the difference of average STC of forests and cultivated arable lands reached 41%, a new growth of forest on some abandoned arable land follows the tendency of STC decrease due to a low productivity level and suppressing effect on grass vegetation.

ACS Style

Alexey R. Desyatkin; Shinya Iwasaki; Roman V. Desyatkin; Ryusuke Hatano. Changes of Soil C Stock under Establishment and Abandonment of Arable Lands in Permafrost Area—Central Yakutia. Atmosphere 2018, 9, 308 .

AMA Style

Alexey R. Desyatkin, Shinya Iwasaki, Roman V. Desyatkin, Ryusuke Hatano. Changes of Soil C Stock under Establishment and Abandonment of Arable Lands in Permafrost Area—Central Yakutia. Atmosphere. 2018; 9 (8):308.

Chicago/Turabian Style

Alexey R. Desyatkin; Shinya Iwasaki; Roman V. Desyatkin; Ryusuke Hatano. 2018. "Changes of Soil C Stock under Establishment and Abandonment of Arable Lands in Permafrost Area—Central Yakutia." Atmosphere 9, no. 8: 308.

Journal article
Published: 31 May 2018 in Atmosphere
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This study was carried out at Kita-mura near Bibai located in central Hokkaido, Japan, with the intention of investigating the effects of different agronomical managements on CH4 emissions from paddy fields on mineral soil over peat under farmers’ actual management conditions in the snowy temperate region. Four fields were studied, including two fields with twice drainage (D1-M and D2-M) and also a single-drainage field (D3-S) under annual single-cropping and a paddy-fallow-paddy crop rotation as their systems. The other field was under single cropping annual with continuous flooding (CF-R) in the pattern of soybean (upland crop)-fallow-paddy. The mineral-soil thickness of these soil-dressed peatland fields varied from 20 to 47 cm. The amount of crop residues leftover in the fields ranged from 277 to 751 g dry matter m−2. Total CH4 emissions ranged from 25.3 to 116 g CH4-C m−2 per growing season. There was a significant relationship between crop-residue carbon (C) and total CH4 emissions during the rice-growing season. Methane fluxes from paddy soils had a strong interaction between readily available C source for methanogens and anaerobic conditions created by water management. Despite the differences in water regime and soil type, the average values of straw’s efficiency on CH4 production in this study were significantly higher than those of southern Japan and statistically identical with central Hokkaido. Our results suggest that the environmental conditions of central Hokkaido in association with crop-residue management had a significant influence on CH4 emission from paddy fields on mineral soil over peat. Rotation soybean (upland)-to-paddy followed by drainage-twice practices also largely reduces CH4 emission. However, mineral-soil dressing on peat could have a significant impact on suppression of CH4 emissions from beneath the peat reservoir.

ACS Style

Habib Mohammad Naser; Osamu Nagata; Sarmin Sultana; Ryusuke Hatano. Impact of Management Practices on Methane Emissions from Paddy Grown on Mineral Soil over Peat in Central Hokkaido, Japan. Atmosphere 2018, 9, 212 .

AMA Style

Habib Mohammad Naser, Osamu Nagata, Sarmin Sultana, Ryusuke Hatano. Impact of Management Practices on Methane Emissions from Paddy Grown on Mineral Soil over Peat in Central Hokkaido, Japan. Atmosphere. 2018; 9 (6):212.

Chicago/Turabian Style

Habib Mohammad Naser; Osamu Nagata; Sarmin Sultana; Ryusuke Hatano. 2018. "Impact of Management Practices on Methane Emissions from Paddy Grown on Mineral Soil over Peat in Central Hokkaido, Japan." Atmosphere 9, no. 6: 212.